Radio vacuum tube



Dec. 1, 1925- 1,564,070

H. K. HUPPERT RADIO VACUUM TUBE Filed Jan. 19. 1923 D'DDOILO I NVENTUR HENRY K HUPF'ER'T HTTUR'NEY Patented Dec. 1, 1925." Y

i 1564.070 UNITED STATES PATENT OFFICE. I

EUIPERT, -OF SAN Fm C1800, GALIFOBNIA.

mm vacuums TUBE.

Application Med January 19, 1928. Serial No. 818,708.

To all whom it may concern/ Be it known 'that'I, HENRY K. HUTPERT,

a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of Califorma, have invented new and useful Improvements in Radlo Vacuum'Tubes, of which the following is a a of detecting, rectifying and .amplifying the same so that they may become audible and intelligible.

The principal object is to providea tube which does not employ a grid thereby elimi' nating the super-imposed static, which at times is very annoying when using a tube having a grld. v f

A still further object is to provide a tube which is exceedingl quiet.

A still further ob ect is to provide a tube which may be employed with radio receiving sets as now upon the market with buta slight alteration.

A A still further object is to provide means for shielding against the escape of any of the electrons from a given path.

Other objects and advantages will be apparent durlng the course of the following description. v

-In the accompanying drawings forming a part of this specification, and in which like numerals are employed to designate like parts throu hout the same,

Figure 1 1s a side elevation of a vacuum tube constructed in accordance with my invention, and partly broken away' for the purpose of better illustration,

Figure 2 is an enlarged detail crosssec- 'tion partly in' elevation showing the arrangement'of parts within the tube and further showing, through the medium of arrows the electronic and -and I Flgure 3 1s a diagrammatic view showing magnetic action of thetube,

. the manner of employingthe tube in a radio receiving circuit.

Up to the present time the most eflicient tubes have employed a filament, a plate and .a grid. The action of tubes of this kind may be summarized as follows Ielectronic emission takes place which es-. capes toward a positively charged plate. A

After the filament has'been lighted an grid is interposed'between the filament and the plate which grid is attached to the in ut or receiving circuit in sucha mannert at the radio. oscillations are'impressed' upon this grid with the result that the same is the filament thereby preventing any elec- Y tronic action'between the filament and the solenoid. This solenoid I connect at both ends to the input or receiving circuit thereby securing a direct flow of' current therethrough with the result that the static which may be super-imposed upon the incoming oscillations cannot affect the" tube in the above described manner.

In the accompanying drawings wherein for the purpose of illustration is'shown .a

preferred embodiment of my invention, thenumeral 5 designates a base having contact pins 6, 7, 8 and 9 mounted therein.- The.

construction .of this base and pins is well known and common in all radio tubes, therefore further discussion of the same will be avoided. j

At 11 I have shown a glass bulb which forms a chamber within which the elements of the tube are enclosed and also serves as a medium for maintaining a proper condition of vacuum about the elements.

A At 12 is shown" a stem of glass fused to the tube 11 and forming a support for the elements of the tube, as 'well as a means for sealing thereinto leads. as shown at 13, 14, 16, 17 and 18. The manner of connecting these as it is well known and merely consists "of a fine piece of platinum w-ire fused into the glass support.

- At 19 I haveshown aplate which is substantially rectangular and is supported by v rods 21 and 22. The rod 21 is connected to the lead 13, while the rod 22 is merely secured in the glass stem 12.

' By referring to Figure 2, it will be noted that this plate 19 is provided with a down leads to the various elements will be omitted,

ward extension 23, for the purpose Qt forming an abiitmentforthe bombardment "of the.

electronic emission. It is of course understood that this extension may be omitted without altering the operation of my'tube. 'At 24 I have shown a coil or solenoid,

one end of which is bent downwardly so' as to form a support 26,..while the opposite end of this coil is bent downwardly so as to lartorina-asupport 27'. r lhe support 26 is concted tothe-lead 141' which lead is in; turn secured .to the; base :5 as. shown in dotted ing material. It is also understood that if I employmore than onezlayer ofconvolutions in my solenoid, the wire must also be insulated. This shield 28 is supported by a rod 29 having its lower extremity sealed in the. glass stem 121 1 4 Parallel spaced conductors 31 and 32 serve to carry currentto a filament 33, which con ductors are connected to the leads 16 and 18,

35 which leads are inrturn connected to the pins 7 and Srespectively. I

By now referrmg to 34 refers to an aerial, 36 we condenser, 37

I to the primary of an inductance, 38 the ground, 39 the secondary oi the inductance,

41 a condenserconnected to one side of the secondary and the numeral 42 a wire leading from the opposite side of the secondarye It will now be noted that the wire 42 is connected to the u per end of the coil or solenoid 24, while the wire 43, leading from they condenser 41 is' connected to the lower end of the solenoid 24, thuscompleting the circuit. f

It will also be noted that the conductor 31 is connected. tothenegative side of an A buttery 44,-while the conductor 32 is connectedthrough a rheostat 46 to the opposite side of the A battery, as well as the negative side of a B battery 47. c The op osite side of this B battery is connected t rough the telephones 4 8 to the" platej19, thus completing a second circuit;

It is tofbe. here noted 'thatthe shield 28- completely. surrounds the filament 33 so that y it 'is impossible" for any of the electrons to some the convolutions of the coil 24 thereby entirely preventing. any' poss'ibility of the solenoid acting' as a 'd, it being a well established fact that -t e electrons will not lines-in Figure 1; The support 27 is conls'sinected to the lead 17' which lead is in turn ing covered withenamel or similar insulat- Figure 3, the numeral fl readily pass through any solid matter, while it is also well known that magnetic lines of force cannot be insulated.

The voperation of my tube is as follows Assu'min' that the current has been turned on so as to eat the filament 33 an electronic emission will commence as indicated by the small dotted arrows in Figure 2,,between the filament and the plate. Assuming thatconditions are at a point of rest the electronic action will be undisturbed and there-- fore adefinite rate of flow will exist.

We will assume now that radio oscillations are received upon the antenna, which oscillations are transferred as shown in Figure 3, from the rimary to the secondary and thence-into t e solenoid circuit, the result being that an oscillating current will be caused to pass through the solenoid 24. This current passing through this solenoid will immediately set up a magnetic flux which will flow as shown by the long arrows in Figure 2, when the current is moving in one direction. This directionof movement of the magnetic flux will reverse when'the current oscillates in the opposite direction, the result being that this,flux being densest in the center of the solenoid will assist the electronic emission-and cause a more rapid bombardment during the period that the flux is moving .in a direction corresponding with these-arrows.

' As the magnetic flux reverses its direction of movement, the result will be that they will oppose the flow of electrons "in an exact proportion to the density of the magnetic It will thus be seen that I have provided a tube which thro h ma "etic action assists or retards the e ectromc flow from the filament to the plate in exact proportion to the magnitude of the oscillations'impressed upon the aerial or input circuit.

-It '-'is to be understood that the form of my- 1nvent1on herewith shown and described is to be taken as a-preferred example of the same, and that various changes in the shape,

size and arrangement of partsma be resorted to without departing'from t e spirit I of the invention or. the scope of the subjoined claims. 4

Having thus claim F 1. Ina device of the character described, a stem, a platesupported above said stemat described i my invention, I

a pointremote therefrom, conductors rising from said stem,'a filament arranged between said conductors at their upperends thereof, an extension depending from the plate and arran ed in the path of the electronic emissions cylindrical electronic shield surroundin said filament, a solenoid 'surroundingsai" shield, said shield being adapted to prevent electronic action between the filament and om the filament, a vertically mounted solenoid, and va bulb secured to said stem and surrounding the above mentioned elements for the purpose of providing a vacuum chamber therefor. g

2. A radio vacuum tube of the character described comprising a base, a stem rising therefrom, 'verticsily disposed parallel arran ed rods having their lower ends embedded in the stem, a. plaizyridging the upper ends of the rods and m supported thereby, conductors rising from t e stem between the rods, a filament secured to the HENRY K. HUPPERT.

ted to prevent electronic l0 

